source: trunk/VUT/Ogre/src/OgreVisibilityTerrainSceneManager.cpp @ 107

#include "OgreVisibilityTerrainSceneManager.h"
#include "OgreOctreeHierarchyInterface.h"
#include "OgreVisibilityOptionsManager.h"
#include <OgreMath.h>
#include <OgreIteratorWrappers.h>
#include <OgreRenderSystem.h>
#include <OgreCamera.h>
#include <OgreLogManager.h>
#include <OgreStringConverter.h>

#include <windows.h>

namespace Ogre {

//-----------------------------------------------------------------------
VisibilityTerrainSceneManager::VisibilityTerrainSceneManager(
        GtpVisibility::VisibilityManager *visManager)
: mVisibilityManager(visManager), 
mUseVisibilityCulling(true),
mShowVisualization(false),
mRenderNodesForViz(false)
{
        mHierarchyInterface = 
                new OctreeHierarchyInterface(this, mDestRenderSystem);

        //mDisplayNodes = true;
        //mShowBoundingBoxes = true;

        // TODO: set maxdepth to reasonable value
        mMaxDepth = 50;
}
//-----------------------------------------------------------------------
VisibilityTerrainSceneManager::~VisibilityTerrainSceneManager()
{
        delete mHierarchyInterface;
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_findVisibleObjects(Camera* cam, bool onlyShadowCasters)
{
        mHierarchyInterface->SetOnlyShadowCasters(onlyShadowCasters);
        // does nothing if hierarchical culling is used =>
        // we interleave identification and rendering of objects 
        // in _renderVisibibleObjects
        if (!mUseVisibilityCulling)
        {
                OctreeSceneManager::_findVisibleObjects(cam, onlyShadowCasters);
                return; 
        }

        //-- show visibile scene nodes and octree bounding boxes from last frame
        if (mShowVisualization)
    {
                // add player camera for visualization purpose
                try {
                        Camera *c;
                        if ((c = getCamera("PlayerCam")) != NULL)
                        {
                                getRenderQueue()->addRenderable(c);
                        }   
        }
        catch(...)
        {
            // ignore
        }
                                
                for (NodeList::iterator it = mVisible.begin(); it != mVisible.end(); ++it)
                {
                        getRenderQueue()->addRenderable(*it);

                        if (mRenderNodesForViz)
                        {
                                (*it)->_addToRenderQueue(cam, getRenderQueue(), false);
                        }
                }
                for (BoxList::iterator it = mBoxes.begin(); it != mBoxes.end(); ++it)
                {
                        getRenderQueue()->addRenderable(*it);
                }
        }
        
        mVisible.clear();
    mBoxes.clear();
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_renderVisibleObjects()
{
        if (!mShowVisualization)
        {
                // two cameras (one for culling, one for rendering)
                mHierarchyInterface->InitFrame(mOctree, mCameraInProgress, 
                                                                mCullCamera ? getCamera("CullCamera") : NULL);

                // call initframe to reset culling manager stats
                mVisibilityManager->GetCullingManager()->InitFrame();
        }

        // standard terrain scenemanager rendering without hierarchical culling
        if (!mUseVisibilityCulling || mShowVisualization)
        {       
                TerrainSceneManager::_renderVisibleObjects();
        
                return;
        } 
        
        //-- hierarchical culling
        // the objects of different layers (e.g., background, scene, 
        // overlay) must be identified and rendered one after another

        //-- render background
        clearSpecialCaseRenderQueues();
        addSpecialCaseRenderQueue(RENDER_QUEUE_BACKGROUND);
        addSpecialCaseRenderQueue(RENDER_QUEUE_SKIES_EARLY);

        setSpecialCaseRenderQueueMode(SceneManager::SCRQM_INCLUDE);
        SceneManager::_renderVisibleObjects();

#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups();
#endif

        //-- render visible objects (i.e., all but overlay)
        clearSpecialCaseRenderQueues();
        addSpecialCaseRenderQueue(RENDER_QUEUE_OVERLAY);
        setSpecialCaseRenderQueueMode(SceneManager::SCRQM_EXCLUDE);


        /** 
        * the hierarchical culling algorithm
        **/
        mVisibilityManager->ApplyVisibilityCulling();


#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups();
#endif

        //-- render overlay
        clearSpecialCaseRenderQueues();
        SceneManager::_renderVisibleObjects();

        //WriteLog(); // write out stats
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_updateSceneGraph(Camera* cam)
{
        mVisibilityManager->GetCullingManager()->SetHierarchyInterface(mHierarchyInterface);
        mHierarchyInterface->SetRenderSystem(mDestRenderSystem);

#ifdef GTP_VISIBILITY_MODIFIED_OGRE
    mHierarchyInterface->SetNumOctreeNodes(mNumOctreeNodes);
#endif
        TerrainSceneManager::_updateSceneGraph(cam);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::setOption(const String & key, const void * val)
{
        if (key == "UseVisibilityCulling")
        {
                mUseVisibilityCulling = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "ShowVisualization")
        {
                mShowVisualization = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "RenderNodesForViz")
        {
                mRenderNodesForViz = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyBoxEnabled")
        {
                mSkyBoxEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyPlaneEnabled")
        {
                mSkyPlaneEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyDomeEnabled")
        {
                mSkyDomeEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                setOption(key, val) || TerrainSceneManager::setOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOption(const String & key, void *val)
{
        if (key == "NumHierarchyNodes")
        {
                * static_cast<unsigned int *>(val) = (unsigned int)mNumOctreeNodes;
                return true;
        }
        
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOption(key, val) && TerrainSceneManager::getOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOptionValues(const String & key, StringVector &refValueList)
{
        return TerrainSceneManager::getOptionValues( key, refValueList);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOptionKeys(StringVector & refKeys)
{
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOptionKeys(refKeys) || TerrainSceneManager::getOptionKeys(refKeys);
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::setVisibilityManager(GtpVisibility::VisibilityManager *visManager)
{
        mVisibilityManager = visManager;
}
//-----------------------------------------------------------------------
GtpVisibility::VisibilityManager *VisibilityTerrainSceneManager::getVisibilityManager( void )
{
        return mVisibilityManager;
}

//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::WriteLog()
{
        std::stringstream d;

        d << "Algorithm type: " << mVisibilityManager->GetCullingManagerType() << ", "
          << "Hierarchy nodes: " << mNumOctreeNodes << ", " 
          << "Traversed nodes: " << mHierarchyInterface->GetNumTraversedNodes() << ", "
          << "Rendered nodes: " << mHierarchyInterface->GetNumRenderedNodes() << ", "
          << "Query culled nodes: " << mVisibilityManager->GetCullingManager()->GetNumQueryCulledNodes() << ", "
          << "Frustum culled nodes: " << mVisibilityManager->GetCullingManager()->GetNumFrustumCulledNodes() << ", "
      << "Queries issued: " << mVisibilityManager->GetCullingManager()->GetNumQueriesIssued() << "\n";

        LogManager::getSingleton().logMessage(d.str());
}


} // namespace Ogre